I don't have the instant replay to remember if I had to push the FOB back in or not. I remember fiddling with it...but it was so quick!

So far...it hasn't done it again.

no the FOB did not come out. i was so pissed off because this happened for a whole week. then all of a sudden it just went away. Hasn't happened since, but now almost every time I start it in the morning or when cold the half engine symbol comes on , then I turn the car off immediately and back on and its fine again.